Power shovel



March 10, 1925- VP. BURKE.

POWER snovm,

Filed Dec. 18 192 2 Sheets-Sheet l" WITNESSES WM- March 10, 1925- P. BURKE POWER SHO'VEL Filed Dec. 18, 1922, 2 Sheets-Sheet 2 INVENTOQ PM WITNESSES My 8 ATTOFQNEY STAEEti PAUL BURKE, OF GREEN BAY, WISCONSIN, .ASSIGNOR TO NORTHNES'I' ENGINEERING- COMPANY, OF GREEN BAY, YVISCONSIN, A CORPORATIDN OF WISCONSIN.

POWER SHOVEL.

Application filed December To all whom, it may concern:

Be it known that 1, PAUL BURKE, a citizen of the United States of America, a resident of the city of Green Bay, Brown County, Wisconsin, have invented certain new and useful Improvements in Power Shovels, of which the following is a specification.

This invention relates to power shovels and more pauticularly to that type of shovel in which the hoisting rope or cable is used to actuate th thrustin g mechanism.

The object of the invention is to improve and simplify power shovels of .the rope thrusting typeand to provide for the thrusting of the dipper handle without the usual gear mechanism or rack and pinions or auxiliary driving apparatus of any kind.

The invention further consists in the several features hereinafter set forth and more particularlynefined by claims at the conclusion hereof.

In the drawings: Fig. 1 is a side elevation of a power shovel mechanism embody ing the invention; Fig. 2 is a plan view thereof; Fig. 3 is-a plan View similar to Fig. 2 showing a modified form of cable arrangement.

In the drawings the numeral l designates the boom, which may be of any suitable cnstruction, vertically pivotally attached at its lower end to the rotating base 5 of the machine,.which base is of well-known construction. hoisting drum 6 and an auxiliary drum 7 are mounted .on the base 5 in any suitable manner and driven from the prime mover (not shown) on the base. The drums 6 and 7 may be of any well-kuo\vn construction equipped'with clutches and brakes to control their operation. The boom is adapt; ed to be raised or lowered and held in various positions of vertical adjustment by any well-kncwn means, such as a cable 8 connecting pulleys 9 at the outer end of the boom to parts on the rotating base. The boom shown is of the plate girder type with the dipper handle 10 working between its sides.

The shipper shaft 11 is preferably secured in brackets 12 on the boom 4: and the saddle 18, 1922. Serial Il'o. 607,510.

1 blocks 13 are loose on the shaft. The dipper handle shown is made in two sections and l as a metal covering 14. Each section of to handle is mounted to slide between the adjacent saddle block and a. flanged roller 15 on the shipper shaft 11. 'A two-part drum or sheave 16 is preferably journaled on the shipper shaft between the rollers 15. The dipper or shovel may be of any suitable construction and is mounted as usual at the lower end of the dipper handle.

In the construction shown in Figs. 1 and 2 the hoisting cade 18 dead-ended on the drum 6 passes therefrom beneath a guide pulley l9 and over a pulley 20 at the outer end of the boom, then around the padlock sheave 21 carried by the dipper and around 1 the larger part of a compound drum 22 on which it is dead-ended. A cable 23 is dead-ended on the small side 24 of the compound drum 22 at the head of the boom and passes once around the sheave or drum 16 on the shipper or. dipper shaft 11 and is dead-ended at 25u1ear the upper end of the dipper stick or handle 10. A cable 26 secured to and wound upon the drum 7 passes over a sheave 27 part of drum 16 and is dead-ended near the dipper as at 28. It will be noted that in this construction the cable or line 2 is not operated directly by any hoisting drum.

xVith the construction above described, when the drum 7 is prevented from turning by its brake, thereby holding the line or cable 26, and the line 18 is pulled in, the dipper moves in the arc of a circle of. which the dipper shaft is the center. If it is desired to crowd further into the bank or to move the dipper farther out, as in loading a wagon, the braking effect on line 26 is released slightly whereupon the line 18 pullon the large side of drum 20 puts a greater pull on line which thereupon forces the dipper stick outward. Conversely, if it is desired to move the dipper farther in, releasing the brake on line 18 and hoist ing with line 9.6 produces this etlect. Thus conveniently formed as a by a proper manipulation of the lines 18 and 26 any desired swinging or thrusting movementof the dipper and its handle may be effected. Furthermore, since the line 23 which effects-the thrust is actuated by the hoist, a crowdin effect equal to the full power of the engine is secured.

The construction above described is preferred but in some instances the line 23 may be a part of the line 18 pass over the sheave 20 through the padlock 21 around the drum 22, as shown in Fig. 3, then around the drum l6 and be dead-ended at the upper end of the stick. Such a construction will operate ;.milarly to that previously described though it does not have the advantages incident to the use of the compound drum 22 of the first described construction.

It will be noted that the thrusting action on the dipper is proportional to the load upon the dipper due to the resistance and weight ot the material it encounters during digging. i

I desire it to be understood that this invention is not to be limited to any specific form or arrangement of parts except in so far as such'limitations are specified in the claims.

hat I claim as my invention is:

1. In an excavating shovel having a lengthwise movable dipper handle, the combination with the hoisting cable, of means including a cable pulling on the dipper" handle and actuated by the hoisting cable for thrusting said handle outwardly to crowd the dipper, and means distinct from said first-named means for retracting the dipper.

2. In an excavating shovel having a lengthwise movable dipper handle, the combination with the hoisting cable, of means actuated by said hoisting cable and pulling on the dipper handle for thrusting said handle outwardly to crowd thedipper, and a separately controlled cable directly connected to said dipper handle for retracting it.

3. In an excavating shovel, the combination with the supporting boom, of a dipper and dipper handle mounted thereon to shift and swing relative to the boom, a shippershaft having a drum mounted thereon, a retracting cable passing over said drum and connected to the lower end portion of the dipper handle, a thrust cable on said drum and associated with the upper end portion of the dipper handle, a drum to which the retracting cable is operatively connected, and a drum for hoisting the dipper to which the thrust cable is operatively connected.

4. In an excavating shovel, the combination with the supporting boom, of a dipper and dipper handle mounted thereon to shiftand swing relative to the boom, a shippershaft having a. drum mounted thereon, a retracting cable passing over said drum and directly connected to the dipper handle, means for operating said cable, a compound drum having portions of dilierent diameters at the outer end of the boom, a hoisting cable having one end anchored to the larger diameter portion of said compound drum and having a bight operatively connected with the dipper, a thrustcable having one end anchored to the smaller diameter portion of said com pound drum and passing around the drum on said shipper-shaft and having its other end directly associated with the dipper handle for outward crowding of the dipper, and. means for operating said hoisting cable.

5. In a power shovel, means for thrusting the lengthwise movable dipper comprising a dipper handle, a shipper-shaft associated with it, a drum on said shaft, and cables on said drum extending in opposite directions and respectively associated with opposite end portions of said dipper handle, hoisting means associated with the outward thrusting cable, and separate means under control of the operator for controlling the operation of said cables.

6. In a power shovel the combination of. a supporting base, a boom carried thereby, .a dipper handle mounted theeron to shift and swing relative to theboom, a shippershaft having a drum mounted thereon, a pair of hoisting drums on said base, two

thrust cables, one of said cables leading from one of said hoisting drums over said ship-- per-shaft drum and to the lower end portion of the dipper handle, the other of said cables leading from the upper end portion of the dipper handle over the shipper shaft drum, and a hoisting cable on the other hoisting drum on the base and operatively connected with the dipper to T3188 and lower the same and operatively connected to that cable ex-, tending to the upper end portion of the dipper handle.

In an eXca-v'ati g shovel, the combination with a supporting boom, of a dipper and dipper handle mounted thereon to shiftand swing with respect thereto, a separately controlled ,cablefor retracting the dipper, a compound drum having portions of different diameters at the outer end of the boom, a hoisting cable having one and anchored to the larger diameter portion of said compound drum and having a bight operatively connected. with .the dipper, a thrust cable per, means for operating said cable by said I dipper in-g said dipper,

'9. In an excavating shovel, the combination with a supporting boom, of a dipper and dipper handle mounted thereon to mo ve len thwise and swing relative thereto, a cab e having pulling connection with the dipper handle for thrusting it outwardly during hoisting, means for hoisting the diper, means for operating said cableby said misting means, and a separately controlled cable for retracting the dipper;

10. In an excavating shove], the combination with asupporting boom, of a dipper and dipper handle mounted thereon to move len thwise and swing relative thereto, a

'cabIo having pulling connection with the dipper handle for thrusting it I outwardly durin llOlStlIl" means for hoistm the di)- g a: f

per, means for ope 'ating said cab e by said hoisting means with an increase in crowding effort over the hoisting effort, and a separately controlled cable for retracting said dipper.- Y

11. In an excavating shovel, the'combination with a supporting boom, of a dipper and dipper handle mounted thereon to swing and move bodilylengthwise relative to the boom, 'conjointly-controlled h'oistin and thrusting m'echanisnrfor the dipper an its handle including a cable acting on the upper ortion and principally lengthwise of the ipper handle in all of its positions for thrusting the dipper and its handle outwardl during hoisting, and separately c011 trolle means for retracting the dipper.

12. In an exca 'ating shovel, the combination with a supporting boom, of a dipper and dipper handle mounted thereon to swmg and move bodily lengthwise relative thereto, a hoisting drum, hoisting and thrusting means actuated by said drum including a cable having a part acting on the upper portion-and principally lengthwise of the handle in all of its positions for thrusting the dipper and its handle outwardly durin" hoisting, and a separately controlled cab.e for retractin the dipper.

13. In an excavating shove the combination with a supporting boom, of a dipper and dipper handle mounted thereon to shift bodily lengthwise and swing with respect thereto, a hoisting drum, cable means between the drum, dipper and dipper handle respectively for hoisting the dipper and exerting a direct end thrust thereon for shiftingsaid handle outwardly during hoisting, and means distinct from said first-named cable means for, controlling such shifting movement and to shift said handle inwardly.

14. In an excavating shovel, the combination with a supporting boom, of a hyper and dipper handle mounted thereon to F-lllfl;

bodily lengthwis and swing with r0: ct

theretopa hoisting drum, cable means between the drum, dipper and dipper ha'ndle respectively for hoisting the dipper and-ex erting a direct end thrust thereon for shifting said liaiidl'uroutwardly during hoisting, and a separately controlled cable for moving the dipper inwardly.

'15. In a power shovel the combination of a boom, a dipper and dipper handle mounted thereon for swinging and lengthwise shifting movements, a dipper hoisting cable, cable actuating means associated with one end thereof, said cable being associated adjacent the other end thereof with the inner end of said dipper. handle. to shift said handle outwardly, and means for controllin such shifting movement and to shift said handle inwardly.

16. In a power shovel the combination of a boom, a dipper and dipper handle mounted thereon for swinging and lengthwise -shift end thereof, said cable being associated adjacent the other end thereof with the inner end of said handle to shift said handle 'outwardl and means including a cable connecte at ,a'tixed point on said handle to shift said handle inwardly.

17. In a power shovel, the combination of a. boom, a dipper and dipper handle mounted thereon to shift bodily lengthwise and swing with respect thereto, cable means operatively associated with fthe outer end of said handle for raising and lowering said dipper and with the inner end'of said handle at a fixed point thereon for shifting said handle outwardly only, and separately controlled means for controlling-such shifting move-- inent and for shifting said handle inwardly.

18. In a power shovel, the combination of a boom, a dipper and dipper handle mounted thereon to shift bodily lengthwise and swing with respect thereto, cable means o1'ieratively associated with the outer end of said handle for raising and 'lowering said dipper and with the inner end ofsaid handle at a fixed point thereon for shifting said. handle outwardly only, and a separately controlled cable for controlling such shifting movement and lor shit'ting said dipper and dipper handle inwardly.

19. In a power shovel, the combination of a bubm, a dipper and lipper handle mounted thereon for swinging and lengthwise shifting movements, a dipper hoisting cable, cable actuating means associated with one end thereof, said cable being associated adjaccnt the other end thereof with 'the inner end of'saiddippe; handle and acting principally lengthwise thereof in all its positions to shift said handle outwardly, and

nu-ans mom and to shift sa' l handle inwardly,

it). In a power sh vel the combination of for contrcl ing such shifting more a boom, a dipper and dipper handle mounted thereon for swinging and lengthwise shiftmg movements, a dipper hoisting cable,

5 end thereof, said cable being associated adjacent the-other end thereof with the mner end of said handle and acting principally cable actuating means associated with-"one on said handle to shift said handle inwardly.

PAUL BURKE. 

